Connector for transferring fluid and method of use

ABSTRACT

A connector for transferring fluid and method therefor. The connector may have a first port, a second port, and a third port which may be coupled together at a main channel with a first valve element therein controlling fluid flow through the first port. The first valve element is supported by a valve element support positioned between the first port and the third port, and the second port joins the main channel to provide a fluid path around the first valve element and through the third port.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.12/538,686, filed Aug. 10, 2009 and now issued as U.S. Pat. No.7,909,056, which is a continuation of U.S. application Ser. No.10/914,797, filed Aug. 9, 2004 and now issued as U.S. Pat. No.7,600,530, which are incorporated herein by reference in their entirety.

TECHNICAL FIELD

The present description is directed to a connector and method fortransferring fluids and, in particular, a connector which incorporates aneedleless access device to transfer fluid.

BACKGROUND OF THE INVENTION

Needleless access devices are used to inject medications or other fluidsinto a patient or withdraw fluids from a patient. These devices havevalves therein that are actuated, for example, by insertion of a maleluer of a syringe into the device. The needleless access devices formpart of an intravenous tubing set, which comprises a length of tubing, aprimary needle or catheter, and/or other connectors. One end of a lengthof tubing is attached to the primary needle or catheter, which is stuckinto a vein of the patient. The other end of the tubing can be connectedto the needleless access device. Alternatively, the needleless accessdevice can be connected directly to the primary needle or catheter. Sucha configuration allows all injections/withdrawal of fluid to be madethrough the needleless access device. Thus, needless access deviceseliminate the need for repeated needle sticks into the patient, therebyavoiding unnecessary trauma to the patient. In addition, needlelessaccess devices prevent needle stick injuries and the possibility oftransmitting blood born pathogens to healthcare professionals.

Needless access devices can also take the form of a Y-connector havingfirst and second inlet ports, an outlet port, and a valve located in thefirst inlet port. The outlet port of the Y-connector is connected by anintravenous tube to a primary needle or catheter, which is inserted intoa patient. And, the second inlet port is connected via an intravenoustube to an intravenous bag. Such a configuration forms the mainintravenous line. The first inlet port, which contains the valve, can beused to inject fluids and/or medication into the main intravenous linefrom a syringe or piggyback intravenous bag. Similar to other needlelessaccess devices, the valve in the first inlet port of the Y-connector isactuated, for example, by insertion of a male luer of a syringe into theY-connector.

Backflow check valves have also been used in medical connectors.Backflow check valves allow for flow of fluid in one direction whilepreventing flow of fluid in the other direction (i.e., backflow). Forexample, when a connector is placed along the path of fluid flow from anintravenous bag to a patient, the check valve acts as a one way valve,allowing fluid to flow to the patient while, at the same time,preventing fluid and/or blood from flowing away from the patient.Moreover, check valves have been used in Y-connectors, which have afirst and second inlet port, and an outlet port. The check valve islocated in the first inlet port and is positioned between, for example,an intravenous bag and the patient (i.e., the main intravenous line).The check valve allows fluid to flow from the intravenous bag to thepatient. Additional fluids can be injected into the main intravenousline through the second inlet port. When fluid is injected into thesecond inlet port, the check valve blocks fluid from flowing around thecheck valve in a direction away from the patient and towards theintravenous bag.

BRIEF SUMMARY OF THE INVENTION

The present invention relates to a connector for transferring fluids. Inparticular, the connector of the present invention incorporates aneedleless access device and a backflow check valve. The connector maycomprise a housing having a first port, a second port, and a third port.A first valve element may be positioned in the first port and a secondvalve element may be positioned in the second port. A first fluid mayflow between the first port and the third port. A second fluid may beintroduced into the connector via the second port and can combine withthe first fluid. Alternatively, the first fluid may be removed from theconnector through the second port.

The present invention also relates to a method of transferring fluid.The first valve element may be in a first position in the first port asa first fluid flows between the first port and the third port. A fluidtransfer device may be inserted into the second port to actuate thesecond valve element. Upon insertion of the fluid transfer device intothe second port, the second valve element can move from a first positionwhere the second port is closed (i.e., fluid cannot be injectedinto/withdrawn from the second port) to a second position where thesecond port is open (i.e., fluid can be injected into/withdrawn from thesecond port). And, when the fluid transfer device is removed from thesecond port, the second valve element may move from the opened positionto the closed position. In the open position, a second fluid may betransferred between the fluid transfer device and the connector via thesecond port or the first fluid may be withdrawn from the connector. If asecond fluid is transferred into the connector through the second port,the first valve element may move from the first position to a secondposition. In the second position, fluid may be prevented from flowingpast the first valve element. Alternatively, if a first fluid iswithdrawn from the connector through the second port, the first valveelement may remain in the first position.

The foregoing has outlined rather broadly the features and technicaladvantages of the present invention in order that the detaileddescription of the invention that follows may be better understood.Additional features and advantages of the invention will be describedhereinafter which form the subject of the claims of the invention. Itshould be appreciated by those skilled in the art that the conceptionand specific embodiment disclosed may be readily utilized as a basis formodifying or designing other structures for carrying out the samepurposes of the present invention. It should also be realized by thoseskilled in the art that such equivalent constructions do not depart fromthe spirit and scope of the invention as set forth in the appendedclaims. The novel features which are believed to be characteristic ofthe invention, both as to its organization and method of operation,together with further objects and advantages will be better understoodfrom the following description when considered in connection with theaccompanying figures. It is to be expressly understood, however, thateach of the figures is provided for the purpose of illustration anddescription only and is not intended as a definition of the limits ofthe present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

For a more complete understanding of the present invention, reference isnow made to the following descriptions taken in conjunction with theaccompanying drawings, in which:

FIG. 1 is a partial cross-sectional view of an exemplary embodiment ofthe connector of the present invention;

FIG. 2 is a cross-sectional view of an alternative exemplary embodimentof the connector of the present invention;

FIG. 2A is a perspective view of an exemplary embodiment of a valveelement of FIGS. 1 and 2;

FIGS. 3A-3B are partial cross-sectional views of an alternativeexemplary embodiment of the connector of FIG. 1 with an alternativefirst port construction;

FIGS. 4A-4B are partial cross-sectional views of another alternativeexemplary embodiment of the connector of FIG. 1 with another alternativefirst port construction;

FIGS. 5A-5B are partial cross-sectional views of another alternativeexemplary embodiment of the connector of FIG. 1 with another alternativefirst port construction;

FIG. 5C is a perspective view of an exemplary embodiment of a valveelement of FIGS. 5A and 5B;

FIGS. 6A-6B are partial cross-sectional views of another alternativeexemplary embodiment of the connector of FIG. 1 with another alternativefirst port construction;

FIG. 6C is a perspective view of an exemplary embodiment of a valveelement of FIGS. 6A and 6B;

FIG. 7 is a partial cross sectional view of an exemplary embodiment of afirst port of FIGS. 1 and 2 along A-A;

FIG. 8 is a partial cross-sectional view of an alternative exemplaryembodiment of the connector of FIG. 1 with another alternative firstport construction;

FIG. 9 is a partial cross-sectional view of an alternative exemplaryembodiment of the connector of FIG. 8 with the first port located in analternative position;

FIG. 10 is a partial cross-sectional view of an alternative exemplaryembodiment of the distal portion of the connector of FIG. 1;

FIG. 11 is a partial cross-sectional view of an alternative exemplaryembodiment of the connector of the present invention; and

FIG. 12 is a partial cross-sectional view of an alternative exemplaryembodiment of the connector of FIG. 1 with an additional port.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1 shows an exemplary embodiment of a connector 2 for transferringfluid. The term “fluid” may include, for example, blood, medication,saline, water, oxygen or other gas, air (i.e., a mixture of gases).

The connector 2 of the present invention may comprise a housing 4, afirst valve element 6, and a second valve element 8. It should, however,be understood that those of ordinary skill in the art will recognizemany modifications and substitutions which may be made to variouselements of the present invention. The housing 4 may comprise a baseportion 10, an offshoot 12, a first cap 14 and a second cap 16. Inanother embodiment of the present invention, as shown in FIG. 2, theconnector 2 a may comprise a housing 4 a, a first valve element 6, and asecond valve element 8 a. The housing 4 a may comprise a base portion 10a, an offshoot 12, a first cap 14 and a second cap 16 a. The baseportion 10, offshoot 12, first cap 14 and second cap 16 of FIG. 1 may bemade of, for example, metal, plastic (e.g., polycarbonate, acrylonitrilebutadiene styrene (ABS)), a composite material (i.e., two or morematerials) (e.g., copolyester), or rubber. The same materials may beused for the base portion 10 a, offshoot 12, first cap 14 and second cap16 a of FIG. 2. Moreover, the base portion 10, base portion 10 a,offshoot 12, first cap 14, second cap 16 and/or second cap 16 a may bemade of the same or different materials and may be transparent oropaque. Various factors may be considered when determining the materialto be used for the base portion 10, base portion 10 a, offshoot 12,first cap 14, second cap 16 and/or second cap 16 a, includingcompatibility with fluids flowing through the connector 2, 2 a (i.e.,material does not chemically and/or physically react with fluids flowingthrough the connector 2, 2 a) (e.g., lipid resistance), the ability towithstand sterilization/cleaning (i.e., cleaning products used insterilization), weight, durability, mechanical strength, resistance tobacterial formation, ease and cost of manufacturing, and ability to beattached to other materials. And, while the base portion 10, baseportion 10 a, offshoot 12, first cap 14, second cap 16 and/or second cap16 a are shown as cylindrical in FIGS. 1 and 2, the base portion 10,base portion 10 a, offshoot 12, first cap 14, second cap 16 and/orsecond cap 16 a may be any shape (e.g., polygonal). Various factor maybe considered when determining the shape of the base portion 10, baseportion 10 a, offshoot 12, first cap 14, second cap 16 and/or second cap16 a, including the compatibility with standard fluid transfer devices(e.g., an intravenous tube, syringe, catheter or other connector), thedesired path of fluid flow, ability of the connector 2, 2 a to beflushed, and clearance around internal components (e.g., the valveelements 6 and 8, 8 a).

Additionally, the base portion 10, base portion 10 a, offshoot 12, firstcap 14, second cap 16 and/or second cap 16 a may be made, for example,by injection molding, extrusion, casting, compression molding ortransfer molding and can be constructed as a single piece or may beseparate pieces attached together by, for example, bonding medium (e.g.,adhesive), threads, ultrasonic welding, ultraviolet curing, tape,corresponding clip and clip engaging portion(s) (e.g., a snapconnection), spin welding or otherwise melting together. For example, inan embodiment of FIG. 1, the base portion 10 and offshoot 12 may haveexternal threads (not shown) on external portions 18 and 20,respectively, to engage internal threads (not shown) of the second cap16 and the first cap 14, respectively. Similarly, in one embodiment ofFIG. 2, the base portion 10 a and offshoot 12 may have external threads(not shown) on external portions 18 a and 20, respectively, to engageinternal threads (not shown) of the second cap 16 a and the first cap14, respectively. In another embodiment of FIGS. 1 and 2, the baseportion 10, 10 a and offshoot 12 may be separate pieces attachedtogether either permanently or removeably by any of the attachment meansdescribed above. Moreover, a washer (not shown) (e.g., an O-ring) may bepositioned between the base portion 10 and the second cap 16, the baseportion 10 a and the second cap 16 a, the offshoot 12 and the first cap14, and/or the base portion 10, 10 a and the offshoot 12 to preventfluid from leaking out of connector 2, 2 a.

Alternatively, the connector 2, 2 a may be molded or otherwise formed,for example, in two halves, which may be joined together by any of themeans described above. In one embodiment, the base portion 10, baseportion 10 a, offshoot 12, first cap 14, second cap 16 and/or second cap16 a may be joined using one or more hinges (not shown). In general, aseparate piece construction may allow for replacement of parts withinthe connector 2, 2 a (e.g., the first valve element 6 and/or the secondvalve elements 8, 8 a) and/or cleaning the inside of connector 2, 2 a.

As shown in FIGS. 1 and 2, the connector 2, 2 a may comprise a firstport 22. All discussion herein regarding the first port 22 applies tothe embodiments shown in both FIGS. 1 and 2. And, even though theconstruction of the first port 22 of FIGS. 3A, 3B, 4A, 4B, 5A, 5B, 6A,6B, 8 and 9 are shown in the context of the connector 2 of FIG. 1, itshould be understood that these constructions also may be incorporatedin the construction of the connector 2 a of FIG. 2.

The first port 22 may comprise the offshoot 12 and the first cap 14. Thefirst port 22 may have a first channel portion 24, a main channelportion 26 containing the first valve element 6, and a connectingchannel 28. The first valve element 6, however, may be located anywherein the first port 22. The first port 22 may be constructed to receive afluid transfer device (e.g., an intravenous tube, syringe, catheter orother connector). The fluid transfer device may be connected to theinside or outside of the first port 22. For example, the first cap 14 ofthe first port 22 may have external or internal threads to engagecorresponding threads of a fluid transfer device. In another embodiment,the first port 22 may be connected to a fluid transfer device using aclip (not shown) on the connector 2, 2 a that engages a clip receivingportion (not shown) on the fluid transfer device (i.e., a snapconnection) or vice versa. In yet another embodiment, a fluid transferdevice may be connected to the cap 14 by, for example, a bonding medium(e.g., adhesive), ultrasonic welding, ultraviolet curing, tape, spinwelding or otherwise melting together. However, the present inventionenvisions all temporary and permanent means of attaching a fluidtransfer device to the first port 22.

The first channel portion 24 may be any shape (e.g., cylindrical orpolygonal), may taper from a proximal portion 28 to a distal portion 30and/or may have sections with varying diameters. Various factors may beconsidered when determining the shape of the first channel portion 24,including the compatibility with a standard fluid transfer device (e.g.,an intravenous tube, syringe, catheter or other connector), the desiredpath of fluid flow, and ability of the connector 2, 2 a to be flushed.For example, as shown in FIGS. 1 and 2 the first channel portion 24 mayhave reduced diameter portions 32 and/or 33. One reason for providingreduced diameter potions 32 and/or 33 may be to form ledges 34 and/or35, respectively, against which a fluid transfer device may abut. Such aconstruction may limit the distance that a fluid transfer device may beinserted into the first port 22. And, as will become apparent from thediscussion below, another reason for reduced diameter portions 32 and/or33 may be to provide a means by which valve element 22 may control fluidflow.

The first channel portion 24 may also have one or more bonding mediumreservoirs 36 which may take the form of one or more recesses or groovesin the first channel portion 24 and, in particular, in the reduceddiameter portion 32. The bonding medium reservoirs 36 may also belocated on the outside of the first port 22 in those embodiment where afluid transfer device is connected to the outside of the first port 22.The bonding medium reservoirs 36 may receive excess bonding medium(e.g., adhesive) when a fluid transfer device is positioned in the firstchannel portion 24 or on the outside of the first port 22 using abonding medium. It should be understood that a bonding medium reservoirmay receive any liquid material which may harden, including any solidmaterial (e.g., solid plastic) that has been melted (e.g., as may resultif a fluid transfer device is ultrasonically welded to the first port22). Another function of the bonding medium reservoirs 36 may also be toprevent bonding medium and/or melted material from spreading into otherportions of the first port 22 such as the main channel portion 26 and/orthe connecting channel 28. Such a construction may be advantageousbecause bonding medium and/or melted material may affect the movement ofthe first valve element 6 and/or the overall flow of fluid through thefirst port 22.

The first valve element 6 may be positioned in the first port 22 and, inparticular, in the main channel portion 26. The first valve element 6may be made of plastic, a foam material, a composite material (i.e., twoor more materials), a combination material (i.e., one material containedwithin another material) (e.g., a gel such as a hydrogel containedwithin rubber) or rubber (e.g., silicon polyisoprene) and may be formed,for example, by injection molding, extruded, casting, compressionmolding or transfer molding. Various factors may be considered whendetermining the material to be used to make the first valve element 6,including compatibility with fluid flowing through the connector 2, 2 a(i.e., material does not chemically and/or physically react with fluidsflowing through the connector 2, 2 a) (e.g., lipid resistance), theability to withstand sterilization/cleaning (i.e., cleaning productsused in sterilization in a hospital), weight, durability, mechanicalstrength, resistance to bacterial formation, ease and cost ofmanufacturing, ability to withstand staining (i.e., from blood or otherchemical products used in a hospital), ability to float in fluids, andmechanical properties (e.g., resiliency; ability to be compressed, bent,folded, or otherwise contorted). And, while the first valve element 6may be made of a material that is impermeable to fluid (i.e., does notallow fluid to pass into or through the first valve element 6 in anysubstantial way), the first valve element 6 may also be made of amaterial that is fluid permeable (i.e., allows fluid to pass into orthrough the first valve element 6). Moreover, the first valve element 6may be transparent or opaque, flexible or rigid, and/or hard or soft.

As shown in FIG. 2A, the first valve element 6 may be a disc which mayhave a thickness between about 0.004 inches and about 0.250 inches,preferably between about 0.030 inches and about 0.20 inches, and, mostpreferably, between about 0.03 inches and about 0.05 inches. The firstvalve element 6 may have a diameter between about 0.02 inches and about0.50 inches, preferably between about 0.05 inches and about 0.25 inches,and, most preferably, between about 0.12 inches and about 0.14 inches.Various factors may be relevant in determining the thickness and/ordiameter of the first valve element 6, including rigidity, flexibility,permeability, compressibility and resiliency (i.e., ability to return tooriginal orientation after compression).

The first valve element 6 may be any shape (e.g., cylindrical,spherical, square, rectangular, triangular, conical, or polygonal), mayhave flat surface(s), and/or may have concave/convex surface(s). Inaddition, the first valve element 6 may have protrusions (e.g.,protrusions 56 in FIG. 6C), indentations or ridges on a portion thereofor over its entire surface. The advantage of such a construction isdescribed below with reference to FIGS. 6A and 6B.

Moreover, as shown in FIGS. 1 and 2, the first valve element 6 may befreely moveable within the first port 22 (i.e., not fixedly attached toany other structure) or, as shown in FIGS. 4A and 4B, may be fixedlyattached within the first port 22 such as, for example, by a hinge 46.The first valve element 6 may be positioned in the first port 22 in anyway so long as fluid may flow past the valve element 6. It should benoted that the term “flow past” or any similar term using the word“past” or “pass” may mean fluid flows through or around any structure inthe connector 2, 2 a including any portion or the entirety of the firstvalve element 6 and/or the second valve element 8, 8 a.

In FIGS. 1 and 2, the valve element 6 may move towards the reduceddiameter portion 33 and may engage an upper stopping portion 38. In thisposition, fluid may be prevented from flowing past the valve element 6(i.e., fluid may not be able to flow between the first channel portion24 and the connecting channel 28). The first valve element 6 may alsomove away from the reduced diameter portion 33 and may engage a lowerstopping portion 40. In this position, fluid may be able to flow pastthe valve element 6, for example, as will be described in detail belowwith reference to the fluid channels 58.

As shown in FIGS. 1 and 2, the main channel portion 26 may be largerthan the first valve element 6 so that the first valve element 6 maymove freely within the main channel portion 26. In an alternativeembodiment, the main channel portion 26 may be substantially the samesize and shape as the first valve element 6. In yet another embodiment,the main channel portion 26 may have fluid paths (not shown) throughwhich fluid may flow past the first valve element 6. These fluid pathsmay extend around a portion or the entire periphery of the first valveelement 6. In addition, the fluid paths may be one or more individualand separated fluid paths or may be one continuous flow path around theentire periphery of the first valve element 6.

FIGS. 3A and 3B illustrate another embodiment of the construction of thefirst port 22. The first valve element 6 may be flexible and abuttingone or more support elements 42 (e.g., prongs) positioned within thefirst port 22. For example, the support elements 42 may be attached tothe offshoot 12 by a connecting portion 44. In one embodiment, theconnecting portion 44 may be conical in shape and may have openings (notshown) which allow fluid to flow past connecting portion 44. Theconnecting portion 44, however, can be any structure, having any shape,that holds one or more support elements 42 within the first port 22. Inuse, the valve element 6 may move between an unflexed position (FIG.3A), where fluid may be prevented from flowing past the first valveelement 6, and a flexed position (FIG. 3B), where fluid may flow pastthe first valve element 6.

FIGS. 4A and 4B illustrate yet another embodiment of the construction ofthe first port 22. The first valve element 6 may be attached within thefirst port 22 using a hinge 46. In this embodiment, the first port 22may comprise a first channel portion 24 and a channel 48. The channel 48may be any size or shape so long as the first valve element 6 may movetherein and allows fluid to flow past the first valve element 6. Thefirst valve element 6 may move between a closed position (FIG. 4A),where fluid may be prevented from flowing past the first valve element 6and an opening position (FIG. 4B), where fluid may flow past the firstvalve element 6.

FIGS. 5A and 5B show another alternative embodiment of the constructionof the first port 22. As illustrated in FIG. 5C, the first valve element6 may have a hole or opening 49. The hole 49 may be any shape or size solong as fluid may flow through the first valve element 6. The firstchannel portion 24 may have a portion 50, which may be held within thefirst channel portion 24 by a connector 52. The connector 52 may be anyshape (e.g., a disc shape) and may have one or more opening 54 to allowfluid to pass therethrough. It should be understood that the connector52 may be any structure which can hold a portion 50 within the firstport 22 and allow fluid to flow past a first valve element 6.

Moreover, the portion 50 may be any shape (e.g., circular, rectangular,square, triangular, conical, cylindrical, polygon) and may have adiameter greater than the diameter of the hole 49. It should be notedthat the portion 50 may be any structure that engages with the firstvalve element 6 and can be used to control the flow of fluid past thevalve element 6. In use, as shown in FIG. 5A, the first valve element 6may move away from the reduced diameter portion 33 and may engage thelower stopping portion 40. In this position, fluid may flow past thefirst valve element 6. And, as shown in FIG. 5B, the first valve element6 may move towards the reduced diameter portion 33 and may engage theupper stopping portion 38 and portion 50. In this position, fluid may beprevented from flowing past the first valve element 6.

FIGS. 6A and 6B illustrate another exemplary embodiment of theconstruction of the first port 22 where the first valve element 6 mayhave one or more protrusions 56 (FIG. 6C). The protrusions 56 may beformed integrally with or may be attached to the first valve element 6.As shown in FIG. 6A, the first valve element 6 may move towards thereduced diameter portion 33 and abut the upper stopping portion 38. Inthis position, fluid may be prevented from flowing past the first valveelement 6. As shown in FIG. 6B, the first valve element 6 may move awayfrom the reduced diameter portion 33 and abut the lower stopping portion40. In this position, fluid may flow past the first valve element 6. Thestopping portion 40 may be a solid ledge and fluid may flow past thefirst valve element 6 by flowing in between protrusions 56 and into theconnecting channel 28 (shown in FIGS. 6A and 6B). Alternatively, thestopping portion 40 may be made up of portions of a wall 59 between oneor more fluid channels 58 (FIG. 7).

In any embodiment of the present invention, the first port 22 and, inparticular, the connecting channel 28 may have one or more fluidchannels 58 (as shown in FIG. 7 which is a view from A-A of FIGS. 1 and2). The fluid flow channels 58 may allow fluid to flow past the firstvalve element 6 (e.g., around the first element 6). As shown in FIG. 7,the fluid channels 58 may be formed in the wall 59 of the first port 22.The fluid channels 58 may extend along a portion of the length of thefirst port 22 (shown in FIG. 1) or over a substantial length of thefirst port 22 (e.g., over substantially the entire length of theconnecting channel 28 (shown in FIGS. 2 and 8)). As illustrated in FIG.7, such a construction may form the lower stopping portion 40, which mayabut with the first valve element 6. It should be noted, however, thanany portion that abuts the first valve element 6 may be a lower stoppingportion 40.

The shorter fluid channels 58 (such as those of FIG. 1) may be effectivein controlling fluid flow past the first valve element 6 and into aconnecting channel 28. This design may prevent the formation of airbubbles within the first port 22 (in particular, below the first valveelement 6); air bubbles may present health risks to a patient(especially children and the elderly). In contrast, longer fluidchannels 58 (such as those in FIG. 2) may not control the flow of fluidaround the first valve element 6 as well as shorter fluid channels 58and may result in air bubbles. Moreover, short fluid channels 58 mayprovide the additional advantages of reducing the priming and/or flushvolumes, which may result in increased efficiency of fluid delivery to apatient. Other reasons for varying the length of the fluid channels 58will also be appreciated by those skilled in the art. It should,however, be understood that the fluid channels 58 can extend anydistance within the first port 22.

Further, the fluid channels 58 may be formed as part of the first port22 or as part of a separate piece (not shown), which may be insertedinto the first port 22. As part of the first port 22, the fluid channels58 may be made of the same material as the first port 22. The separatepiece may be made, for example, of metal, plastic (e.g., polycarbonate,acrylonitrile butadiene styrene (ABS)), a composite material (i.e., twoor more materials) (e.g., copolyester) or rubber. The separate piece maybe made of the same material as or a different material from the firstport 22. Various factors may be considered when determining the materialused for the separate piece, including compatibility with fluids flowingthrough the connector 2, 2 a (i.e., the material does not react withfluids flowing through the connector 2, 2 a) (e.g., lipid resistance),the ability to withstand sterilization/cleaning (i.e., cleaning productsused in sterilization), weight, durability, mechanical strength,resistance to bacterial formation, ease and cost of manufacturing, andability to be attached to other materials. The separate piece may beattached to the inner wall of first port 22, for example, by a bondingmedium (e.g., adhesive), threads, ultrasonic welding, ultravioletcuring, corresponding clip and clip engaging portion(s) (e.g., a snapconnection), spin welding or otherwise melting together. In anembodiment where an operator can gain access to the inside of theconnector 2, the separate piece may be replaceable.

Turning now to the interconnection between ports, the first port 22 maybe connected to a second port 60, 60 a as shown in FIGS. 1 and 2,respectively. The second port 60, 60 a may be integral with the firstport 22 or may be attachable to the first port 22. Alternatively, asshown in the embodiment of FIG. 9, the first port 22 may be connected tothe third port 62. Moreover, in one embodiment of FIG. 2, while notshown, the first port 22 may be connected to the third port 62 a.

In an embodiment where the first port 22, second port 60, 60 a and/orthird port 62, 62 a are all separate pieces, one port may be permanentlyor removeably connected to another port, for example, by a bondingmedium (e.g., adhesive), threads, ultrasonic welding, ultravioletcuring, tape, corresponding clip and clip engaging portion(s) (e.g., asnap connection), spin welding or otherwise melting together. Where theports are removeably connected to each other, an operator may gain entryto the interior of the connector 2, 2 a and may be able to replacecomponents therein and/or clean the inside of the connector 2, 2 a.

Furthermore, the first port 22 may intersect the second port 60, 60 aand/or third port 62, 62 a (e.g., FIG. 9) at an angle 63, 63 a ofbetween about 15 degrees and about 165 degrees, more preferably betweenabout 30 degrees and about 60 degrees and, most preferably, betweenabout 40 degrees and about 50 degrees. The second port 60, 60 a mayintersect the third port 62, 62 a at an angle 63′ between about 15degrees and about 180 degrees, more preferably between about 90 degreesand about 180 degrees and, most preferably, 180 degrees. The anglechosen may be a consideration of various factors, including ease ofinjection/withdrawal of fluid, weight of the connector 2, 2 a in anatural hanging position, and prevention of tube kinking. Moreover, thethird port 62, 62 a may intersect the side 61, 61 a of the second port60, 60 a at any angle describe above.

As shown in FIGS. 1 and 2, a second port 60, 60 a may comprise the baseportion 10, 10 a and second cap 16, 16 a. A fluid transfer device (notshown) (e.g., an intravenous tube, syringe, catheter, or otherconnector) may engage the second port 60, 60 a. For example, the secondcap 16, 16 a may have an external threaded portion 23, 23 a (or aninternal threaded portion (not shown)) to engage a correspondingthreaded portion of a fluid transfer device. All means for attaching afluid transfer device to the second port 60, 60 a, however, areenvisioned (e.g., clip and a corresponding clip engaging portion(s),tape, etc.). Such a design may allow for the fluid transfer device to beheld securely onto the second port 60, 60 a when fluid is transferredbetween a fluid transfer device and the second port 60, 60 a.

Further, the base portion 10, 10 a and second cap 16, 16 a may define achannel 64, 64 a. The channel 64, 64 a may, in turn, comprise a proximalchannel 66, 66 a located at a proximal end 68, 68 a and a main channel70, 70 a. The inner surface of the channel 64, 64 a may be smooth or mayhave, for example, grooves, slots, protrusions, ridges or ribs. Forexample, one or more fluid passageways 69, 69 a may be provide in thesecond cap 16, 16 a. The fluid passageways 69, 69 a may be one or moreindividual longitudinal channels or, as shown in FIGS. 1 and 2, awidened diameter portion around the entire inner surface of proximalchannel 66, 66 a. Moreover, as illustrated in FIG. 2, the main channel70 a may have ribs 71 a, which may have fluid paths therebetween. Suchinternal structure(s) may be provided, for example, to guide the flow offluid past the second valve element 8, 8 a.

Furthermore, the second valve element 8, 8 a may be positioned withinsecond port 60, 60 a. It should, however, be noted that one skilled inthe art would appreciate that the second valve element 8, 8 a may be anyneedless access device such as, for example, those disclosed in U.S.Pat. Nos. 5,676,346; 5,360,413; 5,300,034; 5,242,432; and 5,230,706. Inthe embodiments shown in FIGS. 1 and 2, the second valve element 8, 8 amay comprise a head portion 72, 72 a and a body portion 74, 74 a. Thehead portion 72, 72 a and the body portion 74, 74 a may be one integralpiece or separate pieces. And, as shown in FIGS. 1 and 2, the headportion 72, 72 a and/or body portion 74 may be made of a solid piece ofmaterial and the body portion 74 a may be hollow. However, the headportion 72, 72 a or the body portion 74 may also be hollow and the bodyportion 74 a may also be a solid piece of material.

As shown in FIG. 2, the body portion 74 a may have a wall 75 a definingan internal chamber 77 a, which may contain fluid (e.g., air). The wall75 a may be solid (i.e., there are no holes or openings therethrough).As will be discuss in further detail below with regard to the use of theconnector 2 a, this construction may provide significant advantages whenthe air contained inside the internal chamber 77 a may flow in and outof the connector 2 a through one or more channels 11 a, which maycommunicate with the outside of the connector 2 a. In another embodimentwhere the head portion 72, 72 a and/or body portion 74, 74 a may behollow, there may be one or more openings (not shown) in the headportion 72, 72 a and/or body portion 74, 74 a. Fluid may be able to flowthrough the opening(s) and into and through the head portion 72, 72 aand/or body portion 74, 74 a.

Further, the head portion 72, 72 a and body portion 74, 74 a may be madeof the same or different materials such as, for example, plastic, a foammaterial, a composite material (i.e., made of two or more materials), acombination material (i.e., one material contained within anothermaterial) (e.g., a gel such as a hydro gel contained within rubber) orrubber (e.g., silicon polyisoprene) and may be transparent or opaque.The material may be elastomeric (i.e., compressible, stretchable,bendable, flexible, foldable or otherwise contortable). Various factorsmay be considered when determining the material to be used for the headportion 72, 72 a and body portion 74, 74 a, including compatibility withfluids flowing through the connector 2, 2 a (i.e., the material does notreact with fluids flowing through the connector 2, 2 a) (e.g., lipidresistance), the ability to withstand sterilization/cleaning (i.e.,cleaning products used in sterilization), weight, durability, resistanceto bacterial formation, ease and cost of manufacturing, ability to beattached to other materials, and mechanical properties (e.g., strength,resiliency; ability to be compressed, twisted, bended, folded, orotherwise contorted). Moreover, the head portion 72, 72 a and bodyportion 74, 74 a may be formed, for example, by injection molding (e.g.,liquid injection molding), casting, or extrusion and may be any shape(e.g., polygonal or spherical head; polygonal or cylindrical body).

In embodiments where the head portion 72, 72 a and body portion 74, 74 amay be made of separate pieces, the head portion 72, 72 a and bodyportion 74, 74 a may be connected, for example, by a bonding medium(e.g., adhesive), threads, ultrasonic welding, ultraviolet curing, spinwelding or otherwise melting together.

The second valve element 8, 8 a may also comprise one or more grooves,recesses, notches (e.g., notches 76, 76 a) which may be located in thehead portion 72, 72 a and/or the body portion 74, 74 a or both. As shownin FIG. 2, the body portion 74 a may also comprise one or more undercuts79 a. Further, notches 76, 76 a may be located anywhere on the outersurface of the head portion 72, 72 a and/or body portion 74, 74 a. Andwhere the head portion 72, 72 a and body portion 74, 74 a are hollow, orhave a wall, notches 76, 76 a may be located anywhere on the innersurface of the head portion 72, 72 a and/or body portion 74, 74 a.

The notches 76, 76 a and/or undercuts 79 a may facilitate compression,bending, canting, folding, and/or contorting of the second valve element8, 8 a. In addition, compression, bending, canting, folding, and/orcontorting may also be facilitated by the head portion 72, 72 a and/orbody portion 74, 74 a being molded in a pre-cant position (such as shownin body portion 74 of FIG. 1). Moreover, the notches 76, 76 a and/orundercuts 79 a may assist in guiding fluid flow through the second port60, 60 a, for example, when the valve element 8, 8 a is a compressed,bent, canted, folded, and/or contorted position.

The notches 76, 76 a and undercuts 79 a may be any shape (e.g., round,elliptical, square, rectangular or polygonal), size, and may cover anyamount of area of the head portion 72, 72 a and/or body portion 74, 74a. As shown in the embodiment of FIG. 1, notches 76 may be smile cutsalong a portion of the outer area of both the head and body portions 72,74. And, as shown in FIG. 2, notches 76 a may be a smile cut in the headportion 72 a.

The head portion 72, 72 a may comprise a first enlarged portion 78, 78 awhich may seal opening portion 80, 80 a. The head portion 72, 72 a mayalso have a second enlarged portion 81, 81 a which may engage a shoulderportion 83, 83 a of the second cap 16, 16 a. The enlarged portions 78,78 a and/or 81, 81 a may prevent fluid from flowing past the secondvalve element 8, 8 a.

Furthermore, a top 67, 67 a of the second valve element 8, 8 a may besubstantially flush with respect to the top 73, 73 a of the second cap16, 16 a. Such a construction may allow for antiseptic swabbing of thetops 67, 67 a and 73, 73 a. In another embodiment, not shown, the top67, 67 a of the second valve element 8, 8 a may protrude out of thesecond cap 16, 16 a or may be sunken into the second cap 16, 16 a. Theseconstructions may also allow for antiseptic swabbing. Where top 67, 67 aof the second valve element 8, 8 a may be sunken into cap 16, 16 a, thetop 67, 67 a may be below the level of the top 73, 73 a of the secondcap 16, 16 a. Additionally, the top 67, 67 a of the second valve element8, 8 a may be flat or may have protrusions (not shown) extendingtherefrom. The protrusions may help guide fluid flow past the secondvalve element 8, 8 a.

Moreover, in one exemplary embodiment (not shown), the second valveelement 8 may comprise only a head portion 72 (i.e., no body portion74). The head portion 72 may be fixed to the proximal portion 68 of thesecond port 60 and, in particular, may be fixed in the second cap 16.The head portion 72 may be fixed by, for example, a bonding medium(e.g., adhesive), ultrasonic welding, ultraviolet curing, spin weldingor otherwise melting together. Alternatively, the head portion 72 mayhave one or more protruding portions (not shown) which may be engagewithin receiving portion(s) (not shown) in the second port 60. The headportion 72 may also have a resealable pre-slit orifice or opening (notshown) therethrough for receiving a fluid transfer device. In this way,fluid may be transferred between the fluid transfer device and thesecond port 60.

In another embodiment, where the second valve element 8 may onlycomprise a head portion 72, the head portion 72 may be a solid piece(i.e., no slits or opening therethrough) of rigid or flexible materialand may have a biasing member (not shown), which may be located at adistal end 82 of the head portion 72 and may bias head portion 72 intoproximal channel 66. The biasing portion may be stretchable, and may be,for example, an annular flange around the distal end 82 of the headportion 72 or one or more flange portions. It should be understood thatan annular flange can be any shape (e.g., circular, square, rectangular,polygonal).

In one embodiment, the biasing member may be contained between thesecond cap 16 and the base portion 10 at location 84. The biasing membermay have space between one or more flange portions or, where the biasingmember is an annular flange, may have one or more opening therein. Whena fluid transfer device is inserted into the second port 60, the headportion 72 may be pushed down into the second port 60. The biasingmember and, consequently, the space and/or openings may stretch. In thisembodiment, fluid may flow past the head portion 72, through the spaceand/or openings in the biasing member, and into main channel 70.Further, a head portion 72 made of a rigid material or containing a pinor rod therethrough (e.g., a solid piece of plastic or metal through thehead portion 72) may improve the performance of this embodiment—having arigid head portion may make it easier to stretch the biasing member uponinsertion of a fluid transfer device into the second port 60.

In yet another embodiment, the second valve element 8 may be biased by aspring (not shown) positioned around the body portion 74 of the secondvalve element 8 and held, for example, between the enlarged portion 81and the housing 4—including the wall of the housing 4 and any portionconnected/connectable to the housing 4 (e.g., the valve support 86(discussed below)). Alternatively, a spring may be positioned below thesecond valve element 8 (i.e., between the body portion 74 and thehousing 4).

Referring again to FIGS. 1 and 2, the body portion 74, 74 a may bias thehead portion 72, 72 a into the proximal channel 66, 66 a. It should beunderstood by those skilled in the art that the body portion 74, 74 amay be any structure (e.g., a spring (not shown)) which can bias thehead portion 72, 72 a into the proximal channel 66, 66 a. Moreover, thebody portion 74, 74 a may be fixed or rest freely with respect to thehousing 4, 4 a.

For example, as shown in FIG. 2, the second valve element 8 a may havean circular flange 80 a. The circular flange 80 a may be capturedbetween the base portion 10 a and the second cap 16 a. In particular,the circular flange 80 a may be captured between the base portion 10 aand one or more ribs 71 a of the second cap 16 a. In an alternativeembodiment, the second valve element 8 a may have one or more flangeportions. In yet another embodiment of FIG. 2, the valve element 8 a maybe connected to the base portion 10 a, for example, by a bonding medium(e.g., adhesive), threads, ultrasonic welding, ultraviolet curing, spinwelding or otherwise melting together. Such constructions may fix thesecond valve element 8 a within the housing 4 a.

Alternatively, the body portion 74 may freely rest or be fixed withrespect to a valve support 86. As shown in FIG. 1, the valve support 86may be positioned in the channel 64 of the second port 60 and/or channel88 of the third port 62. The valve support 86 may support the secondvalve element 8 and may comprise one or more holding ribs 90 and a valveseat 92. However, as shown in FIG. 10, in an alternative embodiment, thevalve support 86 may comprise holding ribs 90 and no valve seat 92. Theholding ribs 90 and/or the valve seat 92 may have a concave shape, but,any other shape may also be used. One or more fluid flow channels 93 maybe located between holding ribs 90. The fluid flow channels 93 mayenable fluid to flow past the second valve element 8. It should benoted, however, that the valve support 86 can be any structure locatedanywhere within the second and/or third ports 60, 62, so long as thevalve support 86 supports the second valve element 8 and allows fluid toflow past the second valve element 8.

Further, the holding ribs 90 and the valve seat 92 may be made of metal,plastic (e.g., polycarbonate, acrylonitrile butadiene styrene (ABS)), acomposite material (i.e., two or more materials) (e.g., copolyester), orrubber and may be transparent or opaque. The holding ribs 90 and thevalve seat 92 may be made of the same or different materials from eachother and/or the ports 60, 62. Various factors may be considered whendetermining the material to be used for the holding ribs 90 and thevalve seat 92 including, compatibility with fluids flowing through theconnector 2 (i.e., material does not chemically and/or physically reactwith fluids flowing through the connector 2) (e.g., lipid resistance),the ability to withstand sterilization/cleaning (i.e., cleaning productsused in sterilization), weight, durability, mechanical strength,resistance to bacterial formation, ease and cost of manufacturing, andability to be attached to other materials.

Additionally, the holding ribs 90 and/or the valve seat 92 may beintegral with the surface of the channels 64, 88 or may be separate fromeach other and/or the channels 64, 88. If made of separate pieces, theholding ribs 90 and valve seat 92 may be connected to one another and/orchannels 64, 88 by, for example, a bonding medium, threads, ultrasonicwelding, ultraviolet curing, spin welding or otherwise melting together.And, if the housing 4 is designed to allow access therein, the holdingribs 90 and/or valve seat 92 may be replaceable. Moreover, in anembodiment where the third port 62 may be connected to the side 61 ofthe second port 60, the second valve element 8 may be supported on thewall of the housing 4 (as shown in FIG. 11) and valve support 86 may beunnecessary.

Turning now to the third port 62, 62 a, the third port 62, 62 a may bean integral part of the second port 60, 60 a or may be attachable to thesecond port 60, 60 a. The third port 62, 62 a may be any shape (e.g.,cylindrical, rectangular, polygonal) and/or size. Various factors may beconsidered when determining the shape of the third port 62, 62 a,including compatibility with a standard fluid transfer device, thedesired path of fluid flow, and the ability of the connector 2, 2 a tobe flushed.

FIG. 10 shows an alternative configuration of the third port 62 in thedistal portion 94 of the connector 2 of FIG. 1. In this embodiment, aswell as in FIG. 2, the third port 62, 62 a may be surrounded by a wallportion 96, 96 a which may contain internal threads 98, 98 a forengaging corresponding threads (not shown) of a fluid transfer device.

Furthermore, as shown in FIGS. 11 and 12, other arrangements of thefirst, second and third ports are also envisioned as part of the presentinvention. For example, the connector 2 b of FIG. 11 may comprise afirst port 100 having a first valve element 101, a second port 102having a second valve element 103, a fourth port 104 having a thirdvalve element 105, a third port or connecting port 106 between thesecond port 102 and fourth port 104, and a fifth port 108. The connector2 c of FIG. 12 may comprise first port 110 having a first valve element111, a second port 112 having a second valve element 113, a third port114, and a fourth port 116 having a third valve element 115. While theembodiments in FIGS. 11 and 12 may have more ports and valve elementsthan in FIGS. 1 and 2 and may have different port orientations, theports and valve elements of FIGS. 11 and 12 may be arranged in the sameorientation and configured with the same components and materials asdescribed above with regards to the first port 22, the second port 60,60 a, the third port 62, 62 a, first valve element 6 and the secondvalve element 8, 8 a. Moreover, the connectors 2 b (FIG. 11) and 2 c(FIG. 12) (as well as their ports and valve elements) may function andmay be used in the same way as described in detail below for FIGS. 1 and2.

Moreover, it should be noted that any of the components of the presentinvention, including the specific embodiments described herein, mayincorporate an antimicrobial compound or may have an antimicrobialcoating covering a portion or the entire surface of the components. Theantimicrobial compound or coating may inhibit the growth of bacteria. Anantimicrobial material may be formed, for example, by adding acommercially available antimicrobial compound such as Agion™ produced byAgion™ Technologies Inc. of Wakefield, Mass., to, for example, plasticor rubber. This material, in turn, may be used to make a component ofthe present invention. Alternatively or in addition, an antimicrobialcompound may be sprayed, painted or otherwise affixed to the surface ofany component of the present invention and, thus, form a coatingthereon.

In use, a portion of a first fluid transfer device 200, 200 a (e.g.,intravenous tube, syringe, catheter, or other connector) may beconnected (either permanently or removeably) to the first port 22. Theother end of the first fluid transfer device 200, 200 a may be connectedto, for example, an intravenous bag. For example, one end of anintravenous tube may be inserted into the first port 22 and the otherend may be inserted into an intravenous bag. A second fluid transferdevice 202, 202 a, for example, another intravenous tube may connect thethird port 62, 62 a to a patient. The path of fluid flow from the firstfluid transfer device 200, 200 a, through the first port 22, the secondport 60, 60 a, the third port 62, 62 a, and into the second fluidtransfer device 202, 202 a may form part of a main fluid line. As shownfor example in FIGS. 1, 2, 3B, 4B, 5A and 6B, the first valve element 6may be in a first position as a first fluid flows past the first valveelement 6. The first fluid may flow through connecting channel 28, intothe second port 60, 60 a and through the channel 88, 88 a of third port62, 62 a. In an alternative embodiment such as FIG. 9, the first fluidmay flow directly from the first port 22 (e.g., through the connectingchannel 28) to the third port 62, 62 a. In another embodiment of theconnector 2 (FIG. 1), as the first fluid flows between the second port60 and the third port 62, the first fluid may flow through the valvesupport 86. In addition, in embodiments comprising the fluid channels58, the first fluid may flow through the fluid channels 58.

Furthermore, an operator may use the second port 60, 60 a to transfer asecond fluid into the connector 2, 2 a (e.g., into the main intravenousline) and/or transfer fluid from the connector 2, 2 a. To accomplishthis, a third fluid transfer device 204, 204 a may be connected to thesecond port 60, 60 a. A portion (e.g., a male luer) of the third fluidtransfer device 204, 204 a may be inserted into the second port 60, 60a. In the embodiments of FIGS. 1 and 2, insertion of the third fluidtransfer device 204, 204 a into the second port 60, 60 a may result incompression, canting, bending, folding, and/or contorting of the secondvalve element 8, 8 a within the second port 60, 60 a (i.e., the headportion 72, 72 a and/or body portion 74, 74 a may compress, cant, bend,fold, and/or contort). In other words, the axis (not shown) of thesecond valve element 8, 8 a may be displaced from the axis (not shown)of the second port 60, 60 a. And, the top 67, 67 a of the second valveelement 8, 8 a may move from a first position (shown in FIGS. 1 and 2),where the top 67, 67 a may be substantially flush with the top 73, 73 a,to a second position. It should be understood that a second position maybe any position which is not the first position.

In an exemplary embodiment where the third fluid transfer device 204,204 a has threads (not shown) to engage the external threaded portion23, 23 a of the second port 60, 60 a, as the third fluid transfer device204, 204 a is threaded onto the second port 60, 60 a, the second valveelement 8, 8 a may continue to compress, cant, bend, fold, and/orcontort (and possibly twist) and may move further down into the secondport 60, 60 a. And, as the third fluid transfer device 204, 204 a movesfarther into the second port 60, 60 a, the second valve element 8, 8 amay move out of proximal channel 66, 66 a into a second position (e.g.,within the main channel 70, 70 a). In FIG. 2, insertion of the thirdfluid transfer device 204 a may also result in the air contained inchamber 77 a moving through channels 11 a and out of connector 2 a.

In a second position, fluid may flow past the second valve element 8, 8a. In an embodiment comprising the first enlarged portion 78, 78 a andfluid passageways 69, 69 a, fluid may flow past the second valve element8, 8 a as the first enlarged portion 78, 78 a moves past the fluidpassageways 69, 69 a. In an embodiment where there are no fluidpassageways 69, 69 a, fluid may flow past the second valve element 8, 8a as the first enlarged portion 78, 78 a moves out of the proximalchannel 66, 66 a and into the main channel 70, 70 a. In an embodimentwithout the first enlarged portion 78, 78 a fluid may flow past thesecond valve element 8, 8 a at any time after the third fluid transferdevice 204, 204 a is positioned adjacent to the top 67, 67 a of thesecond valve element 8, 8 a.

Moreover, the flow of fluid between the proximal channel 66, 66 a andthe main channel 70, 70 a may be prevented when the second enlargedportion 81, 81 a engages an inner portion of the second port 60, 60 a(e.g., shoulder portion 83, 83 a). Upon disengagement of the secondenlarged portion 81, 81 a from an inner portion of the second port 60,60 a (e.g., shoulder portion 83, 83 a), fluid may flow between theproximal channel 66, 66 a and the main channel 70, 70 a.

When the second valve element 8, 8 a is in a second position, the secondfluid may be transferred to the second port 60, 60 a from the thirdfluid transfer device 204, 204 a and may combine with the first fluid.It should be understood that the term “combine” can mean that the firstand the second fluid join to form a homogenous third fluid (e.g.,dilution of a medication in saline) or that the first and second fluidsmay remain separate from one another (e.g., blood in water; oil inwater). Alternatively, the first fluid may be transferred to the thirdfluid transfer device 204, 204 a from the second port 60, 60 a (i.e.,fluid may be withdrawn from the connector 2, 2 a).

As the second fluid is transferred to the second port 60, 60 a from thethird transfer device 204, 204 a, the first valve element 6 may movefrom the first position to a second position as shown, for example, inFIGS. 3A, 4A, 5B, and 6A. It should be understood that a second positionmay be any position that is not the first position. In a secondposition, fluid may be prevented from flowing past the first valveelement 6 in a direction towards the first fluid transfer device 200,200 a. The movement of the first valve element 6 from the first to asecond position may be the result of fluid pressure created by thetransfer of the second fluid from the third fluid transfer device 204,204 a to the second port 60, 60 a. Alternatively, the movement of thefirst valve element 6 may also result from the insertion of the thirdfluid transfer device 204, 204 a into the second port 60, 60 a.

In general, with reference to FIGS. 1 and 2, when the second fluid istransferred from the third fluid transfer device 204, 204 a to thesecond port 60, 60 a, the second fluid (along with the first fluid) mayflow past the valve element 8, 8 a into and through the channel 88, 88 aof the third port 62, 62 a and into the second fluid transfer device202, 202 a. In one embodiment of FIG. 1, fluid may pass through thechannels 93 as the fluid flows between the second port 60 and the thirdport 62. Moreover, in the embodiment of FIG. 2, fluid may flow past thevalve element 8 a and flow in between ribs 71 a, around the circularflange 80 a via path 91 a, through fluid port 93 a and out channel 88 a.Alternatively, fluid may flow in the opposite direction when fluid istransferred from the second port 60, 60 a to the third fluid transferdevice 204, 204 a.

If and when the third fluid transfer device 204, 204 a is removed fromthe second port 60, 60 a, the second valve element 8, 8 a may return toits first position (e.g., with the top 67, 67 a of the second valveelement substantially flush with the top 73, 73 a). In the embodiment ofFIG. 1, this may result in negative pressure (i.e., fluid within theconnector 2, the first fluid transfer device 200, and/or the secondfluid transfer device 202 may flow in a direction towards the openingportion 80).

In the embodiment of FIG. 2, as the second valve element 8 a moves toits first position, air may flow from outside the connector 2 a throughchannels Ha and into chamber 77 a. Such a construction may result inpositive pressure or self-flushing (i.e., fluid within the connector 2a, the first fluid transfer device 200 a, and/or the second fluidtransfer device 202 a may flow in a direction 206 a). It should beunderstood that any self-flushing construction may be integrated intothe connector 2, 2 a, such as those constructions disclosed in U.S. Pat.No. 5,730,418, which is incorporated herein by reference. In both FIGS.1 and 2, negative pressure may also occur if and when the first fluidtransfer device 200, 200 a is removed from the first port 22.

Although the present invention and its advantages have been described indetail, it should be understood that various changes, substitutions andalterations can be made herein without departing from the spirit andscope of the invention as defined by the appended claims. Moreover, thescope of the present application is not intended to be limited to theparticular embodiments of the process, machine, manufacture, compositionof matter, means, methods and steps described in the specification. Asone of ordinary skill in the art will readily appreciate from thedisclosure of the present invention, processes, machines, manufacture,compositions of matter, means, methods, or steps, presently existing orlater to be developed that perform substantially the same function orachieve substantially the same result as the corresponding embodimentsdescribed herein may be utilized according to the present invention.Accordingly, the appended claims are intended to include within theirscope such processes, machines, manufacture, compositions of matter,means, methods, or steps.

What is claimed is:
 1. A connector for transferring fluid, the connectorcomprising: a housing having a first port, a second port configured toaccept an actuator, a third port, and an internal chamber fluidicallycoupled to the first, second, and third ports; and a first valve elementhaving a first position and a second position within the internalchamber, the first valve element comprising a head portion having atleast one notch and a body portion having a cavity with a perimeter, thehead portion configured to seal the second port when the first valveelement is in the first position, the body portion configured to sealthe perimeter of the cavity to the internal chamber to separate theinternal chamber into an air chamber and a liquid chamber; wherein thehousing further comprises a passage from the air chamber to an outsideof the housing; and wherein the liquid chamber is continuously coupledto the first and third ports regardless of the position of the firstvalve element.
 2. The connector of claim 1, wherein: the actuatorcomprises a lumen; the first valve element is configured such thatintroduction of the actuator into the second port displaces the firstvalve element to the second position, thereby opening a fluid path fromthe lumen of the actuator to the liquid chamber, and removal of theactuator from the second port allows the first valve element to move tothe first position; and the first valve element is further configuredsuch that the air chamber has a first air volume when the first valveelement is in the first position and a second air volume when the firstvalve element is in the second position, the second air volume beingless than the first air volume.
 3. The connector of claim 2, wherein thehousing and first valve element are configured such that the liquidchamber has a first liquid volume when the first valve element is in thefirst position and a second liquid volume when the actuator isintroduced into the second port, the second liquid volume being largerthan the first liquid volume.
 4. The connector of claim 3, furthercomprising a second valve element disposed between the first port andthe internal chamber, the second valve element configured to allow fluidto flow from the first port to the internal chamber while resisting flowfrom the internal chamber to the first port, such that removal of theactuator from the second port causes the liquid volume to expel fluidthrough the third port.
 5. The connector of claim 2, wherein theactuator comprises a male Luer fitting.
 6. The connector of claim 5,wherein the first port is configured to accept a male Luer fitting. 7.An intravenous (IV) set, comprising: a connector comprising: a housinghaving a first port, a second port configured to accept an actuator, athird port, and an internal chamber fluidically coupled to the first,second, and third ports; and a first valve element having a firstposition and a second position within the internal chamber, the firstvalve element comprising a head portion having at least one notch and abody portion having a cavity with a perimeter, the head portionconfigured to seal the second port when the first valve element is inthe first position, the body portion configured to seal the perimeter ofthe cavity to the internal chamber to separate the internal chamber intoan air chamber and a liquid chamber; wherein the housing furthercomprises a passage from the air chamber to an outside of the housing;and wherein the liquid chamber is continuously coupled to the first andthird ports regardless of the position of the first valve element; afirst tube coupled to the first port; and a second tube coupled to thethird port.
 8. The IV set of claim 7, further comprising a first fittingconfigured to couple to an IV container, wherein the first tube has afirst end that is coupled to the first port and a second end that iscoupled to the first fitting.
 9. The IV set of claim 8, furthercomprising a second fitting, wherein the second tube has a first endthat is coupled to the third port and a second end that is coupled tothe second fitting.
 10. The IV set of claim 9, wherein the secondfitting comprises a Luer fitting.
 11. The IV set of claim 7, wherein thefirst and second tubes are bonded to the first and third ports,respectively.
 12. A method of introducing a second medical fluid into aflow of a first medical fluid, the method comprising the steps of:coupling a first source containing the first medical fluid to a firstport of a connector further comprising a second port configured toaccept an actuator, a third port, an internal chamber fluidicallycoupled to the first, second, and third ports, a first valve elementhaving a first position and a second position within the internalchamber, the first valve element comprising a head portion having atleast one notch and a body portion having a cavity with a perimeter, thehead portion configured to seal the second port when the first valveelement is in the first position, the body portion configured to sealthe perimeter of the cavity to the internal chamber to separate theinternal chamber into an air chamber and a liquid chamber, the airchamber having a first air volume when the first valve element is in thefirst position and a second air volume when the first valve element isin the second position, the second air volume being less than the firstair volume, the liquid chamber having a first liquid volume when thefirst valve element is in the first position and a second liquid volumewhen the actuator is introduced, the second liquid volume being largerthan the first liquid volume, wherein the housing further comprises apassage from the air chamber to an outside of the housing, and whereinthe liquid chamber is continuously coupled to the first and third portsregardless of the position of the first valve element; coupling thethird port to a recipient; allowing the first medical fluid to flow fromthe first source to the recipient; introducing an actuator having alumen that is fluidically coupled to a second source containing thesecond medical fluid into the second port, thereby displacing the firstvalve element to the second position and opening a fluid path from thesource of the second fluid to the liquid chamber; and causing the secondmedical fluid to flow from the second source through the lumen into theliquid chamber.
 13. The method of claim 12, further comprising the stepof: removing the actuator from the second port, thereby allowing thefirst valve element to allows the first valve element to move to thefirst position.
 14. The method of claim 13, wherein the connectorfurther comprises a second valve element disposed between the first portand the internal chamber, the second valve element configured to allowfluid to flow from the first port to the internal chamber whileresisting flow from the internal chamber to the first port, such thatremoval of the actuator causes the liquid volume to expel fluid throughthe third port.